# SDR TSAA0253142

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2002
- Submitted: June 7, 2002
- Operation: Air carrier
- Aircraft: [N810AL](https://openairdocs.org/aircraft/N810AL), registered now
- Make and model: Boeing 737-2Y5
- Registry model: [Boeing 737-2Y5](https://openairdocs.org/model/boeing-737-2y5) (OpenAirDocs)
- Aircraft serial: 24031
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Part number: 6573746
- Condition: Corroded
- Location: Lt Wing
- Part time: 39,494 hours, 42,355 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TSAA0253142

## Discrepancy

FOUND CORROSION ON THE LEFT HAND OUTBOARD WING MAIN BOX UPPER SKIN AT WBL 71.24, STR 5, 7 AND WBL92.5 STR 1, 5.  BLENDED OUT CORROSION AT A 10:1 RATIO MINIMUM PER SRM.  ULTRASOUND INSPECTED TO ENSURE NO REMAINING CORROSION.  HFEC AFFECTED FASTENER HOLE BORE FOR CRACK DETECTION.  INSPECTED WING SURFACE USING 10X VISUAL.  SHOT PEENED WING SURFACE PER OHM.  REPLACED REMOVED FASTENERS WITH .0312 INCH OVERSIZE TENSION HEAD HI-LOKS.  INSTALLED FASTENERS WITH BMS 5-95 SEALANT IN TRANSITION FIT HOLES AND REFINISHED PER SRM IAW ECO.

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